11@Abhirup check out the changed q in #24
y = 16x2 + 8(a+5)x -7a -5
Find. prob of graf of y bein STRICTLY gr8er than ZERO for x ε [-20,0]
PN : Ther is no condition given on a..... i dunno y........ i feel its an incomplete Questn .... if u tooo feel so do tell me
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26 Answers
13@wats in name
see wat the q ask...its the value of f(x)>0
you found the condition of the roots to be complex
13for diff values of a we ll get diff probability.....
the graph will be diff for diff values of a
11I think the question must have been
y = 16x2 + 8(a+5)x -7a -5
Find. prob of graf of y bein STRICTLY gr8er than ZERO for not x here a ε [-20,0]
11isnt that -D/4a
then D<0 is correct
we get a condition on a
but what is the sample space? if a can take all possible values prob would be 0
13how can the square of a real term be negetive
1ya it says d prob d graph is > 0
means it shud b in d seond qudrant .......
so y cordinate shud b >0.......
bt y cordinate is -D^2/4a .............we noe taht
so D^2<0
so we get condition for a
nw
a can take 12 values .......
so required /total cases
13i think the Q is wrong
sumthing abt a must be told ...
21** wats the differentiation of [] and {} at non int. poits ??? o n 1 resp??
1no they are not at integer points
at non integral values they are differentiable..
21I genereal dbt : Are [x] and {x} differentiable ???
i.e. talking non-integral values....